Hey bud, congrats on the new GTI.
I have read that you want to go Uni 1+, and I can tell you That I had that since August and I liked it a lot. Miro at Euroline in Missisauga did the work.
Now I just went to stage 2 (3 inch BB downpipe) and it is a MONSTER!!!
Unfortunately, for me, Unitronic just updated their software to OPEN ECU flash once and then if you want to upgrade then they can do it through The OBD PORT. For mine they had to open it twice...grrrr. But Miro knows what he is doing, and since he is an APR dealer as well, he will put the sealant on the ecu to prevent water from going in the ECU.
The other dealers in Toronto are SEM Motorsports. MArco there is a cool cat, but I think Miro has opened more of them...
Hope this helps you.